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Registros recuperados: 5
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Constraints to the sustainability of a stockless arable rotation Organic Eprints
Cormack, W F.
The sustainability of an organic stockless arable rotation on a fertile soil in eastern England was assessed from 1990 to 2005. The good water and nutrient holding characteristics of the silty clay loam soil were well suited to a stockless organic rotation. Fertility-building clover crops were the most difficult to establish, and failed completely in some years despite one or two re-sowings. Crop yields were good, particularly for cereals, with an average for winter wheat of 7 t ha-1. Crop yield did not show any particular trend with time; there was no evidence of either a post conversion adjustment period, or a fall in yield due to declining fertility. High organic crop prices in the 1990s, resulted in significantly higher gross margins than from...
Tipo: Conference paper, poster, etc. Palavras-chave: Crop health; Quality; Protection Crop combinations and interactions Weed management.
Ano: 2006 URL: http://orgprints.org/10262/1/Constraints_to_the_sustainability_of_a_stockless_arable_rotation.pdf
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Einfluss des Gemengepartners Leindotter (Camelina sativa L.) auf Beikrautbesatz, Schädlingsbefall und Ertrag in Körnererbsen Organic Eprints
Ackermann, Kerstin; Saucke, Dr. Helmut.
The effect of mixed cropping semi-leafless peas with linseed dodder (Camelina sativa (L.) Crtz.) on weed development and pest incidence was investigated in small plot experiments in Northern Hessen, Germany, over two years. Mixed cropping peas together with linseed dodder had a significant suppressive effect on weed-coverage, in average 62 % efficacy in 2003 and 54 % in 2004, compared to mono cropped peas. The infestation level of pea aphid (Acyrthosiphon pisum) and the damage incidence of pea moth (Cydia nigricana) in harvested peas, was neither significantly reduced nor enhanced. In both years mixed cropping peas gained a relative surplus in yield compared to peas grown as a sole crop. The results demonstrate the advantageous complementary use of...
Tipo: Conference paper, poster, etc. Palavras-chave: Crop health; Quality; Protection Crop combinations and interactions Weed management.
Ano: 2005 URL: http://orgprints.org/3788/1/3788.pdf
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Einfluss verschiedener Saattermine auf den Erbsenwicklerbefall (Cydia nigricana Fabr.) in ökologischen Gemüseerbsen Organic Eprints
Schultz, Britta; Saucke, Dr. Helmut.
The pea moth (Cydia nigricana) has developed to the most serious pest in organic green peas in recent years. In 2003 about 20 % of the contracted acreage needed to be rejected by the processing industry, due to the very low tolerance levels requiring at least 99,5 % (w/w) non affected high quality peas. The present study investigated the influence of different sowing dates on the damage level in green peas. In a small scale field experiment arranged in a complete randomized block design with four replicates three common cultivars suitable for early, mid and late sowings, namely Avola, Gonzo, Trompet, respectively, were utilized. Each variety was sown at an early and a late date, resulting in six sowing dates at total, covering the entire sowing period from...
Tipo: Conference paper, poster, etc. Palavras-chave: Crop health; Quality; Protection Crop combinations and interactions Weed management.
Ano: 2005 URL: http://orgprints.org/3786/1/3786.pdf
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Index beregner hvor godt økologisk vårbyg konkurrerer med ukrudt Organic Eprints
Rasmussen, Ilse A.; Hansen, Preben Klarskov.
Kornafgrøder og –sorter har forskellig evne til at undertrykke ukrudt. Dette skyldes blandt andet sortens evne til at skygge for lyset og optage vand og næringsstoffer. For sorter med en samlet god konkurrenceevne gælder at: de er langstråede de har kraftig bladmasse gennem vækstsæsonen de har en hurtig fremspiring og vækst Denne viden er udnyttet til at beregne et konkurrenceindeks af sorten overfor ukrudt. De fleste forsøg vedrørende disse forskelle er gennemført under konventionelle forhold, hvor niveauet af næringsstoffer er højt, og ukrudt og andre skadevoldere bekæmpes kemisk. Under økologiske forhold vil der oftest være en lavere og mere varierende forsyning med næringsstoffer. For at afklare om dette har en betydning for...
Tipo: Journal paper Palavras-chave: Crop health; Quality; Protection Crop combinations and interactions Weed management.
Ano: 2005 URL: http://orgprints.org/5917/1/5917.PDF
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Intercropping – The practical application of diversity, competition, and facilitation in arable and organic cropping systems Organic Eprints
Jensen, Erik Steen; Hauggaard-Nielsen, Henrik; Kinane, Julia; Andersen, Mette Klindt; Jørnsgaard, Bjarne.
Intercropping (IC) is the simultaneous cultivation of more than one crop species on the same piece of land. The IC practice offers many advantages to organic agriculture in terms of resource use, yield stability, weed management and increased diversification of agroecosystems. Field experiments carried out at two sites in Denmark over three consequetive cropping seasons showed that ICs of cereals and grain legumes gave higher yields, less weeds, lower infection with plant diseases and higher grain quality compared to corresponding sole crops.
Tipo: Conference paper, poster, etc. Palavras-chave: Crop health; Quality; Protection Crop combinations and interactions Weed management.
Ano: 2005 URL: http://orgprints.org/6176/1/6176.doc
Registros recuperados: 5
Primeira ... 1 ... Última
 

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